Home / 28,510-39,344.64-15,934.78

Finding the Fourth Proportional to 28,510, 39,344.64 and 15,934.78

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Solution

The fourth proportional to 28,510, 39,344.64 and 15,934.78 is: 21,990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510 : 39,344.64 = 15,934.78 : x
  2. Step 2: Convert to fraction form
    28,510/39,344.64 = 15,934.78/x
  3. Step 3: Cross multiply
    28,510x = 39,344.64 × 15,934.78
  4. Step 4: Simplify right side
    28,510x = 626,948,182.58
  5. Step 5: Solve for x
    x = 626,948,182.58/28,510
  6. Step 6: Final answer
    x = 21,990.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.